add page cache with read-ahead and dirty writeback, file-backed and anonymous mmap with CoW, VAD-based virtual memory replacing the old user region model, PFN database with eviction and reclaim, file identity for cross-open section sharing, FAT32 path cache and per-file cluster chain cache, serial.sys for COM1 keyboard input, xHCI MSI with INTx and polled fallback, PciEnableMsiAuto, waitable input queue, KeWaitForAnyEvent, per-process thread info syscall, expanded kernel stats (PFN/PTE/VAD/file-cache/disk), pool allocation tags, async I/O user buffer locking, file flush on close, add docs.md.

code/kernel/ke_irp.c

@@ -138,7 +138,7 @@ static size_t IoIrpSize(uint8_t stackCount) {
 __declspec(dllexport) KSTATUS IoAllocateIrp(uint8_t stackCount, IRP** outIrp) {
     if (!outIrp) return STATUS_INVALID_PARAMETER;
     if (stackCount == 0) stackCount = 1;
-    IRP* irp = (IRP*)MmAllocatePool(IoIrpSize(stackCount));
+    IRP* irp = (IRP*)MmAllocatePoolTag(IoIrpSize(stackCount), MM_POOL_TAG('i', 'r', 'p', ' '));
     if (!irp) return STATUS_NO_MEMORY;
     IoInitializeIrp(irp, stackCount);
     *outIrp = irp;